When you have 4 hours of writing ahead of you and it’s due in 2 hours.

Dejagoo is the strange feeling that you've been in this sticky situation before. It is dejavu due to goo. Usual symptoms are shivers down once's spine followed by disgust, especially if actual goo is involved.

Laying back on the couch, with your girlfriend or best buds, enjoying a large greasy pizza and cold michelob light, while watching a good movie on the tube.

can be used as sarcasm for a terrible day, or series of events.

having a good meal, some good drinks, and getting laid on the same night. (when your favortie football team wins the super bowl)

stuff that goes on after marriage.

A good time is when you are describing an item, person or place. This isn't the usual meaning of a good time. This is when an item is a good time or that person is a good time. It's specifying a single thing that is a good time just in an odd way.
Same thing goes for "a bad time"